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Dubai

Presentation On Types Of Force Year 7

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Published in: Physics
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Contact and Non contact forces

Jadeer M / Dubai

4 years of teaching experience

Qualification: Post Graduation & BEd In Physics

Teaches: Biology, Chemistry, Physics, Maths, English, Science, Environmental Science, Mathematics

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  1. WELCOME
  2. PRIOR KNOWLEDGE Force is a push or a pull acting on an object. shutters tock com • 1587071026
  3. Force Represent by letter F Unit of force is Newton(N)
  4. STARTER ACTIVITY See the following figures Can you say that all the forces are equal in nature?
  5. We can walk Apple falling down from a tree Iron nail and magnet attract each other
  6. TOPIC:DIFFERENT TYPES OF FORCES : To understand different types LEARNING OBJECTIVE of forces, Classification of forces into contact and non-contact forces according to its nature.
  7. ACTIVITY See the video and discuss in groups
  8. Group activity 1 l.ln which of the surface we can easily walk? 2.Why?
  9. FRICTION/FRICTIONAL FORCE Friction is the force that acts on every object in the direction opposite to that of the motion of the object. It slows down moving objects. FrJctlonai Force Pushing force
  10. EXPERIMENT WITH MAGNETS TO DEMONSTRATE MAGNETIC FORCE
  11. Magnetic force is the force offered by a magnet Magnets attract magnetic substances example; Iron nail, steel screws etc
  12. GRAVITATIONAL FORCE Throwing ball experiment
  13. The gravitational force is a force that attracts any two objects with mass
  14. DEMONSTRATE ELECTRO STATIC FORCE
  15. ELASTIC FORCE
  16. STUDENT CHALLENGE You have understood these forces. For every force contact is necessary. Is it true or false?
  17. Forces are mainly classified into two based on the presents or absents of physical contact with object CONTACT FORCE A FORCE THAT IS EXERTED ONLY WHEN TWO OBJECTS ARE TOUCHING. A force that is exerted only when two objects are touching . A force that one object exert on another When they are not touching. NONCONTACT FORCE A FORCE THAT ONE OBJECT EXERTS ON ANOTHER WHEN THEY ARE NOT TOUCHING. Noncontact forces include the gravitational force, electric force, magnetic force.
  18. The point where the force is applied is called POINT OF CONTACT or POINT OF APPLICATION OF FORCE.
  19. QUIZ TIME Identify the following forces and classify into Contact and Non-Contact Force
  20. WHAT WE HAVE Different types of force in brief LEARNT TODAY *Frictional Force *Magnetic Force *Gravitational Force *Electric/Electrostatic Force *Elastic Force Contact and Non-Contact Forces
  21. CLASS WORK 1.What do you mean by Contact Force? List out some examples 2. What is Non-Contact Force? Can you mention some examples?
  22. I.Contact forces A force that is exerted only when two objects are touching eg; Frictional Force, Elastic Force 2. Non contact force: A force that one object exert on another when they are not touching eg; Gravitational force, Magnetic force, Electrostatic force
  23. FOLLOW UP ACTIVITY List out some real life situations where contact and non contact forces are observed
  24. ????????

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